package com.ych.utils;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.type.TypeFactory;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.SerializationException;
import com.alibaba.fastjson.parser.ParserConfig;
import org.springframework.util.Assert;
import java.nio.charset.Charset;

/**

* Redis使用FastJson序列化
  */
  public class FastJsonRedisSerializer<T> implements RedisSerializer<T>
  {
  
   public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");
  
   private Class<T> clazz;
  
   static
   {
  
       ParserConfig.getGlobalInstance().setAutoTypeSupport(true);
  
   }
  
   public FastJsonRedisSerializer(Class<T> clazz)
   {
  
       super();
       this.clazz = clazz;
  
   }
  
   @Override
   public byte[] serialize(T t) throws SerializationException
   {
  
       if (t == null)
       {
           return new byte[0];
       }
       return JSON.toJSONString(t, SerializerFeature.WriteClassName).getBytes(DEFAULT_CHARSET);
  
   }
  
   @Override
   public T deserialize(byte[] bytes) throws SerializationException
   {
  
       if (bytes == null || bytes.length <= 0)
       {
           return null;
       }
       String str = new String(bytes, DEFAULT_CHARSET);
      
       return JSON.parseObject(str, clazz);
  
   }

    protected JavaType getJavaType(Class<?> clazz)
    {
        return TypeFactory.defaultInstance().constructType(clazz);
    }

}
